| 四元体系NaCl+NaBO2+Na2CO3+H2O 298.15 K 相平衡研究 |
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| 引用本文： | 马玉军,王晓,李淑雅,张付康,李娟.四元体系NaCl+NaBO2+Na2CO3+H2O 298.15 K 相平衡研究[J].无机盐工业,2022,54(10):42-46. |
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| 作者姓名： | 马玉军 王晓 李淑雅 张付康 李娟 |
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| 作者单位： | 青海大学化工学院,青海 西宁 810016 |
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| 基金项目： | 青海省科技厅项目(2019-2J-7043) |
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| 摘 要： | 柴达木盐湖中具有丰富的盐湖离子,对其中的一个四元体系水盐相图开展研究,采用等温溶解平衡法开展了298.15 K时四元体系NaCl+NaBO2+Na2CO3+H2O相平衡研究,测定了体系平衡液相组成及密度和折光率,绘制了四元体系NaCl+NaBO2+Na2CO3+H2O 298.15 K的相图及相应的物化性质图。研究发现NaCl+NaBO2+Na2CO3+H2O四元体系298.15 K 时包含2个共饱点（E1、E2）、5条溶解度曲线（AE1、BE1、CE2、DE2、E1E2）、4个结晶区（NaCl、NaBO2·4H2O、Na2CO3·7H2O、NaCl·NaBO2·2H2O）。其中三元体系NaCl+NaBO2+H2O在298.15 K下产生了复盐NaCl·NaBO2·2H2O,通过研究发现该四元体系NaCl+NaBO2+Na2CO3+H2O在298.15 K下也具有NaCl·NaBO2·2H2O复盐区。
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| 关 键 词： | 相平衡 四元体系 溶解度 盐湖 |
| 收稿时间： | 2021-12-29 |
Phase equilibria of quaternary system of NaCl+NaBO2+Na2CO3+H2O at 298.15 K |
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| MA Yujun,WANG Xiao,LI Shuya,ZHANG Fukang,LI Juan.Phase equilibria of quaternary system of NaCl+NaBO2+Na2CO3+H2O at 298.15 K[J].Inorganic Chemicals Industry,2022,54(10):42-46. |
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| Authors: | MA Yujun WANG Xiao LI Shuya ZHANG Fukang LI Juan |
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| Affiliation: | School of Chemical Engineering,Qinghai University,Xining 810016,China |
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| Abstract: | There were abundant ions in the salt lake of Qaidam,and the water salt phase diagram of a quaternary system was studied.The phase equilibrium of NaCl+NaBO2+Na2CO3+H2O at 298.15 K was studied by isothermal solution equilibrium method,the composition,density and refractive index of the equilibrium liquid phase of the system were measured.The phase diagram of the quaternary system of NaCl+NaBO2+Na2CO3+H2O 298.15 K and its corresponding physico-chemical properties were drawn.It was found that the system of NaCl+NaBO2+Na2CO3+H2O at 298.15 K contained two saturation points （E1,E2）,five solubility curves（AE1,BE1,CE2,DE2,E1E2）,four crystallization regions（NaCl,NaBO2·4H2O,Na2CO3·7H2O,NaCl·NaBO2·2H2O）.In the ternary system NaCl+NaBO2+H2O,double salt NaCl·NaBO2·2H2O was produced at 298.15 K.The study showed that the quaternion system of NaCl+NaBO2+Na2CO3+H2O also had NaCl·NaBO2·2H2O double salt region at 298.15 K. |
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| Keywords: | phase equilibrium quaternary system solubility salt lake |
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